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principal parts

noun, Grammar
1.
a set of inflected forms of a form class from which all the other inflected forms can be derived, as sing, sang, sung; smoke, smoked.
Origin
1865-1870
1865-70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for principal parts
  • The following are the principal parts governing the nuclear power plant operators.
  • These cells have three principal parts: the dendrites, the cell body, and one axon.
  • The principal parts of the device are a light unit, positioning arm and firmware timer to control duration of exposure.
  • Patents and patent applications consist of two principal parts.
British Dictionary definitions for principal parts

principal parts

plural noun
1.
(grammar) the main inflected forms of a verb, from which all other inflections may be deduced. In English they are generally considered to consist of the third person present singular, present participle, past tense, and past participle
2.
the sides and interior angles of a triangle
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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15
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